They often help kids ________ dancing.
Many people believe we will face environmental disasters _________ we completely change the way we live.
—Have you decided when to leave for Australia? —Not yet. We _________ set off at the end of this month.
We are _________ by doctors to eat more natural food and take plenty of physical exercise.
—Hi, Amy. Why are you so sad? —Well, I found the computer I had had _________ went wrong again.
—Where have you _________ all day? —I came back at noon and I _________ in this room ever since.